﻿//
// App.xaml.cpp
// Implementation of the App class
//

#include "pch.h"
#include "HubPage.xaml.h"

using namespace App1;
using namespace App1::Common;

using namespace concurrency;
using namespace Platform;
using namespace Windows::ApplicationModel;
using namespace Windows::ApplicationModel::Activation;
using namespace Windows::Foundation;
using namespace Windows::Foundation::Collections;
using namespace Windows::UI::Core;
using namespace Windows::UI::Xaml;
using namespace Windows::UI::Xaml::Controls;
using namespace Windows::UI::Xaml::Controls::Primitives;
using namespace Windows::UI::Xaml::Data;
using namespace Windows::UI::Xaml::Input;
using namespace Windows::UI::Xaml::Interop;
using namespace Windows::UI::Xaml::Media;
using namespace Windows::UI::Xaml::Navigation;

// The Hub Application template is documented at http://go.microsoft.com/fwlink/?LinkID=321221

/// <summary>
/// Initializes the singleton application object.  This is the first line of authored code
/// executed, and as such is the logical equivalent of main() or WinMain().
/// </summary>
App::App()
{
	InitializeComponent();
	Suspending += ref new SuspendingEventHandler(this, &App::OnSuspending);
}

/// <summary>
/// Invoked when the application is launched normally by the end user.	Other entry points will
/// be used when the application is launched to open a specific file, to display search results,
/// and so forth.
/// </summary>
/// <param name="e">Details about the launch request and process.</param>
void App::OnLaunched(LaunchActivatedEventArgs^ e)
{

#if _DEBUG
		// Show graphics profiling information while debugging.
		if (IsDebuggerPresent())
		{
			// Display the current frame rate counters
			 DebugSettings->EnableFrameRateCounter = true;
		}
#endif

	auto rootFrame = dynamic_cast<Frame^>(Window::Current->Content);

	// Do not repeat app initialization when the Window already has content,
	// just ensure that the window is active
	if (rootFrame == nullptr)
	{
		// Create a Frame to act as the navigation context and associate it with
		// a SuspensionManager key
		rootFrame = ref new Frame();
		SuspensionManager::RegisterFrame(rootFrame, "AppFrame");

		// Set the default language
		rootFrame->Language = Windows::Globalization::ApplicationLanguages::Languages->GetAt(0);

		rootFrame->NavigationFailed += ref new Windows::UI::Xaml::Navigation::NavigationFailedEventHandler(this, &App::OnNavigationFailed);

		auto prerequisite = task<void>([](){});
		if (e->PreviousExecutionState == ApplicationExecutionState::Terminated)
		{
			// Restore the saved session state only when appropriate, scheduling the
			// final launch steps after the restore is complete
			prerequisite = SuspensionManager::RestoreAsync();
		}
		prerequisite.then([=](task<void> prerequisite)
		{
			try
			{
				prerequisite.get();
			}
			catch (Platform::Exception^)
			{
				//Something went wrong restoring state.
				//Assume there is no state and continue
			}

			if (rootFrame->Content == nullptr)
			{
				// When the navigation stack isn't restored navigate to the first page,
				// configuring the new page by passing required information as a navigation
				// parameter
				rootFrame->Navigate(TypeName(HubPage::typeid), e->Arguments);
			}
			// Place the frame in the current Window
			Window::Current->Content = rootFrame;
			// Ensure the current window is active
			Window::Current->Activate();

		}, task_continuation_context::use_current());
	}
	else
	{
		if (rootFrame->Content == nullptr)
		{
			// When the navigation stack isn't restored navigate to the first page,
			// configuring the new page by passing required information as a navigation
			// parameter
			rootFrame->Navigate(TypeName(HubPage::typeid), e->Arguments);
		}
		// Ensure the current window is active
		Window::Current->Activate();
	}
}

/// <summary>
/// Invoked when application execution is being suspended.	Application state is saved
/// without knowing whether the application will be terminated or resumed with the contents
/// of memory still intact.
/// </summary>
/// <param name="sender">The source of the suspend request.</param>
/// <param name="e">Details about the suspend request.</param>
void App::OnSuspending(Object^ sender, SuspendingEventArgs^ e)
{
	(void) sender;	// Unused parameter

	auto deferral = e->SuspendingOperation->GetDeferral();
	SuspensionManager::SaveAsync().then([=]()
	{
		deferral->Complete();
	});
}

/// <summary>
/// Invoked when Navigation to a certain page fails
/// </summary>
/// <param name="sender">The Frame which failed navigation</param>
/// <param name="e">Details about the navigation failure</param>
void App::OnNavigationFailed(Platform::Object ^sender, Windows::UI::Xaml::Navigation::NavigationFailedEventArgs ^e)
{
	throw ref new FailureException("Failed to load Page " + e->SourcePageType.Name);
}